Take-down square.



- PATENTED FEB. 27, 1906. C. K. SITTON & J. H. WILLIAMS.

TAKE-DOWN SQUARE. APPLICATION FILED mmzo, i905.

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' which shoulders are preferably made bevel-' TTNITED STATES PATENT CHARLES K. SITTON AND JOHN H. WILLIAMS, OF PORTLAND, OREGON.

TAKELDOWN SQUARE.

Specification of Letters Patent.

PatentedFeb. 27, 1906..

Application filed March 20, 1905. Serial No. 251,044.

To all whom it may concern:

Be it known that we, CHARLES K. SITTON and JOHN H. WILLIAMS, citizens of the United States, and residents of Portland, in the county of Multnoma'h and State of Oregon, have invented a new and useful Take-Down Square, of which the following is a specification, reference being had to the accompanymg drawings as constituting a part thereof.

A square is a necessaryimplement in nearly every kit of tools and frequently is made quite large, so as to facilitate the squaring or checking up of the work under construction, and in consequence it is an awkward implement to be carried about.

Our invention therefore has for its object to obtain a square the members of which may be separated or taken a art, so that when the square is not in use suc members may be arranged side by side in a convenient way in the tool-box for carrying about.

We attain our object in the manner illustrated in the drawings above referred to.

In such drawings, Figure 1 represents the under side of the angle part of a square. Fig. 2 represents the upper side of the same part of the square. Fig. 3 represents the under side of the intersecting end of the member a. Fig. 4 represents the under side of the intersecting end of the member I). Fig. 5 is a section on the line a; as of Fig. 1. Figs. 6 and 7 represent, respectively, a section, on a larger scale, on a line y gof- Fig. I; and Fig. 8 is a plan view of the cam g.

The letters designate the parts referred to.

By observing the figures described it will be noticed that the scheme of construction of our square is such that the two members may be readily taken apart or, as we term it, taken down and rearranged and locked together in the form of a. square, and when so rearranged and locked together the members a. 12 thereof shall form a true square. To attain this end, the members a b are made with projecting lips a. b, respectively. The members are further made with shoulders c (1,

ing in cross-section, and the inner edges of the projecting lips 11. b, abutting against such shoulders, are also beveled to have a better bearing therewith. In the lip b of the member b are provided apertures e f, which may be of rectangular form, as shown, or elliptic or circular, since only a section of the wall encompassing such apertures are used as bearingpoints, as presently will be explained.

The lip a, of the member 0. is provided with two rotatable cams g g, arranged and constructed as shown. The outer faces of said cams g g are made with screw-heads g ,='so that the same may be rotated by a common screw-driver in order to lock the members a b together after having been properly arranged. W hen the members have been arranged in their proper positions, the beveled inner edge of the lip b of the member I) will lie against the shoulder c of the member a, and the beveled inner edge of the lip a of the member a will lie against the beveled shoulder d of the member I), and the cams g g will have been inserted in their apertures e -.A partial turn to the right of each cam wi 1 now cause the cam g to bear against the wall 6 of the aperture e, thereby drawing the inner beveled edge of the lip b of the member I) and the shoulder c of the member atightly against each other, and the cam g will bear against the wall f of the aperture f and draw the inner edge of the lip a of the member a and the shoulder d of the member I) tightly against each other. The cams g g and the edges and shoulders of the members a b being properly arranged and made, it follows that the described action of locking the members a b together will cause the same to assume a true right-angular position with respect to each other and in so doing form a square The construction and arrangement of the camsis shown in Fig. 5. Each thereof comrises a cam-disk g and an integral screwead g. The latter is inserted in an aperture therefor made in the lip a, the margin of which aperture is countersunk. The camdisk g is larger in diameter than said aperture to provide a bearing-shoulder, and the margin of the screw-head is spread a trifle to secure the cam in place.

In the drawings the cams g g are shown as being of elliptical construction; but we do not limit ourselves to that particular arrangement for obtaining the result described.

Having fully described our invention, what we claim, and desire to secure by Letters Patent, is

1. As a new article of manufacture, the combination oftwo separable members a, b,

the intersecting ends of which are respecparts are assembled, and so arranged that the partial rotation of, said cams will interlock the intersecting ends of said members substantially as described.

2. As a new article of manufacture, the combination of two separable members a, b, the intersecting ends of which are respectively made with lips a, b, and interlocking shoulders, the li s of one member being made with apertures ike c, f, and the lip of the other member being provided with rotatable elliptical cams inserted in said apertures when the parts are assembled, and so arranged that the partial rotation of said cams will interlock the intersecting ends of said members substantially as described.

3; As a new article of manufacture, the combination of two separable members a, b, the intersecting ends of which are respectively made with 1i s a, I), having beveled inner edges and wit beveled shoulders d for said inner edges to abut against; the lip of one member being made with apertures like c, f, and the lip of the other member being provided with rotatable cams inserted in said apertures and so arranged that the partial rotation of said cams will interlock the intersecting ends of said members substantially as described.

4. As a new article of manufacture, the combination of two separable members a, b, the intersecting ends of which are respec tively made with lips a, I), having beveled inner edges and with beveled shoulders d for said inner edges to abut against; the lip of one member being made with apertures like 0, f, and the lip of the other member being provided with rotatable, elliptical cams inserted in said apertures and so arranged that the partial rotation of said cams will interlock the intersectin ends of said members substantially as described.

In testimony whereof we have hereunto affiXed our signatures in the presence of two witnesses.

CHAS. K. SITTONi JOHN H. WILLIAMS. WVitnesses:

T. J. GEIsLER,

ELLA ANDERSON. 

